then the style assumes the authors are different and puts the initial or full name in the citation to disambiguate the entries. So the first thing to do is go to the Sciwheel site and open the edit metadata window for these references and make sure the author details are exactly the same for each reference cited (pay extra attention to the first name/initial field - even one character's difference, or just an empty space is enough to trigger the disambiguation rules). After you've done this, go back to your document and refresh your citations and they should fix themselves.